Answer:
Tool of thief, toy of queen. Always used to be unseen. Sign of joy, sign of sorrow. Giving all likeness borrowed.
I wear a red robe, with staff in hand and a stone in my throat. What am I?
The warmer I am, the fresher I am. What am I?
What is the edge of earth and bread?
What room do ghosts avoid?
No matter how little or how much you use me, you change me every month.